Fourth-year medical students may borrow up to $15,000 for one year. Interest rates are fixed or variable, and repayment options include interest-only payments for the first 24 months of the loan up to the first year of medical practice. Mail Application to National Association of Residents & Interns , Hillsboro Executive Center North, 350 Fairway Drive, Suite 200, Deerfield Beach, FL 33441-1834. Or, fax it to (954) 571-8582. Download Application. For questions call (800)221-2168.